San Quentin 27.5" 1

San Quentin 1 profile, grey/black. San Quentin 1 profile, tan/black.

See this bike in a different color:

  • Price: $1,599*
  • Suspension: SR Suntour XCM34 Boost
  • Wheel Size : 27.5"
  • Frame: Aluminum
  • Size Range: S, M, L, XL

Manufacturer’s suggested retail price may not include additional shipping or preparation charges. Please contact your local Marin dealer for a quote.

The San Quentin 1 is our bang-for-your-buck hardcore hardtail that looks and rides like a bike twice the price. Because why should fewer dollars in the bank mean fewer good times on the trails?

We've packed in an SR Suntour XCM34 suspension fork, Vee Tire Co tires, Tektro disc brakes and a load of awesome Marin components to create a bike you’ll love to rip, but that won’t shred your budget. And we've given it a bad-ass paint job that'll cut it alongside those big-bucks bikes.


  • Frame

    Series 2 6061 Aluminum, Double Butted Frame, Internal Cable Routing, 141mm Open Dropout, 73mm Threaded BB

  • Front Suspension

    SR Suntour XCM34 Boost 15x110mm Spacing, 130mm Travel, Coil Spring, 27.5", Bolt-On Thru-Axle

  • Rims

    Marin Aluminum Double Wall, Disc Specific, 29mm Inner, Pinned Joint, 32H, Tubeless Compatible

  • Hub, Rear

    Forged Alloy, Quad Sealed Cartridge Bearings, Alloy Axle, QR type, 141mm Width, Disc, 32H, Shimano Standard Freehub Body

  • Hub, Front

    Forged Alloy, 110x15mm, Sealed Cartridge Bearing, Disc, 32H

  • Spoke, Nipples

    14g Black Stainless Steel

  • Tires

    Vee Tire Co., Flow Snap, 27.5x2.6", MPC Compound, Wire Bead

  • Derailleur, Rear

    microSHIFT RD-M9195M, 9 Speed, With Clutch

  • Derailleur, Front


  • Shift Lever

    microSHIFT SL-M9195-R, 1x9 with Bearings

  • Crankset

    Marin Forged Alloy, Integrated Steel 32T Narrow Wide Chainring, Boost Spacing

  • Bottom Bracket

    Sealed Cartridge Bearing, Square Taper

  • Chain

    KMC X-9

  • Cassette

    SunRace, 9 Speed, 11-46T

  • Brake, Front

    Tektro M275 Hydraulic Disc, 180mm Rotor

  • Brake, Rear

    Tektro M275 Hydraulic Disc, 180mm Rotor

  • Brake Levers

    Tektro M275 Hydraulic

  • Handlebar

    Marin Mini-Riser, 6061 Double Butted Aluminum, 780mm Width, 28mm Rise, 5º Up, 9º Back

  • Stem

    Marin Alloy, 45mm

  • Grips

    Marin MTN, Closed End

  • Headset

    FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”

  • Seatpost

    Marin Alloy, 30.9mm

  • Saddle

    Marin Speed Concept

  • Pedals

    Marin Oso OE Flat

  • Extras


Specifications, pricing, and availability are subject to change without notice.


San Quentin 27.5" 1 geometry diagram
Stack 623.4 627.9 636.9 641.4
Reach 422 450 470 500
Headtube Angle 64° 64° 64° 64°
Headtube Length 110 115 125 130
Seattube Angle 77° 77° 77° 77°
Seattube Length 310 340 375 414
Toptube Effective 565.9 594.9 617 648.1
BB Height 316 316 316 316
BB Drop 50 50 50 50
Chainstay 425 425 425 425
Wheelbase 1176 1206.2 1230.6 1262.8
Standover Height 628.1 657 665.4 681.6
Fork Offset 47 47 47 47
Seatpost Diameter 30.9 30.9 30.9 30.9
Handlebar Width 780 780 780 780
Stem Length 35 35 35 35
Crank Length 170 170 170 170

All lengths in millimeters



The San Quentin 1 features a Series 2 aluminum frame, with tapered head tubes, 3D forged drop outs, IS brake mounts, and semi-internal cable routing. The San Quentin 2 and 3 feature Series 3 aluminum frames, with more advanced tube forming, more complex dropouts, post mount disc tabs, full internal cable routing, and a boost 148mm thru-axle

Learn More
Profile image of the San Quentin 3 on a gravel driveway


Taking cues from the Alcatraz, the San Quentin line up provides all the benefits of the DJ style with massive stand over, slick frame tubes, and a sexy paint job.

Detail image of the San Quentin 3 headtube, showing the slack 65° headtube angle


The slack head tube angle paired with a steep seat tube angle create a ride that will fly uphill with perfect front wheel precision but then descend like it’s on rails. The balanced rider position thanks to the steep seat tube puts your weight between the wheels for impressive climbing and handling on flats, while the slack front end and short rear center help to pull you through the rough descents and corners with an intuitive feel.

Detail image of the San Quentin 3, highlighting the crankset and ISCG 05 tabs


San Quentin 2 and 3 models feature ISCG 05 tabs for easy chain retention device installation for rowdier riders.

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